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You searched for: subject:"instability"
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[texts]Nota de Investigación: Utilización de un banco de datos de inestabilidad política. - Simon Schwartzman
Fundación Bariloche, 1967 Se trata de una utilización de lo que es posiblemente la técnica de inducción más potente de que dispone la sociología -el análisis factorial. Aunque no pudiéramos tener una idea clara de lo que significan, intuitivamente, los scores que encontramos, estos scores derivan lógicamente de los datos disponibles, de tal manera que no nos alejamos en ningún momento de la realidad...
Keywords: Political Instability
Downloads: 3
[texts]Strength of wing beams under axial and transverse loads - Ramberg, Walter
No Abstract Available
Keywords: CYLINDERS, METAL - INSTABILITY
Downloads: 42
[texts]Space research projects at the university of wisconsin semiannual report - NON
No Abstract Available
Keywords: ROCKET ENGINES; TAYLOR INSTABILITY
Downloads: 67
[texts]563
Control theorists have extensively studied stabilityas well as relative stability of LTI systems. In this researchpaper we attempt to answer the question. How unstable is anunstable system? In that effort we define instability exponentsdealing with the impulse response. Using these instabilityexponents, we characterize unstable systems.
Keywords: Stability; Relative Stability; Instability Exponent
Downloads: 5
[movies]Topological Features of a Compressible Plasma Vortex Sheet: 6 Cases - NASA/Goddard Space Flight Center Scientific Visualization Studio
The Voyager and Pioneer Spacecraft have detected large-scale quasi-periodic plasma fluctuations in the outer heliosphere beyond 20 AU. A plasma vortex sheet model can explain these fluctuations and the observed correlations between various physical variables. The large scale outer heliosphere is modeled by solving the 3-D compressible magnetohydrodynamic equations involving three interacting shear layers...
Keywords: Heliosphere, Instability, Plasma, Space science; What -- Voyager
Downloads: 49
[movies]Topological Features of a Compressible Plasma Vortex Sheet - a Model of the Outer Heliospheric Wind - NASA/Goddard Space Flight Center Scientific Visualization Studio
The Voyager and Pioneer Spacecraft have detected large-scale quasi-periodic plasma fluctuations in the outer heliosphere beyond 20 AU. A plasma vortex sheet model can explain these fluctuations and the observed correlations between various physical variables. The large scale outer heliosphere is modeled by solving the 3-D compressible magnetohydrodynamic equations involving three interacting shear layers...
Keywords: Heliosphere, Instability, Plasma, Space science; What -- Voyager
Downloads: 53
[texts]Optimization of Decision Process in a Theory of Financial Instability - Konrad Raczkowski
A theory of financial instability, positively verified through adverse consequences of the global financial crisis that started in 2007, demonstrates the significance put on adequate decision making in present age. Thus, optimization of operations in this respect applies to providing suitable frameworks for supervision and functioning of financial markets which may be more predictable and secure for individual stakeholders.
Keywords: Financial Instability; Optimization; Decisions; Financial Markets; Supervision
Downloads: 7
[movies]PIT: 6-OHDA Contralateral Limb - Schallert Lab
Video shows the displacement required to trigger a "catch-up" step in the contralesional limb of a rat with a unilateral 6-OHDA lesion to the medial forebrain bundle. Displacement is greater than both the ipsilateral limb and the unimpaired limb of a control animal.
Keywords: PIT; 6-OHDA; postural instability test; passive initiation threshold
Downloads: 292
[movies]PIT: 6-OHDA Ipsilateral Limb - The Schallert Lab
Video shows the displacement required before making a "catch-up" step in the ipsilateral forelimb of an animal with a unilateral 6-OHDA lesion to the medial forebrain bundle. Note the distance required is shorter than both the contralesional limb, and the limb of the control animal.
Keywords: PIT; 6-OHDA; postural instability test; passive initiation threshold
Downloads: 220
[texts]HYDRAULIC LINE DYNAMICS - Goodson, R. E.
Hydraulic line dynamics - transient response and instability
Keywords: HYDRAULICS; STABILITY; TRANSIENT RESPONSE; HYDRAULICS; INSTABILITY; TRANSIENT RESPONSE
Downloads: 148
[movies]PIT: Control Animal - Schallert Lab
Video shows displacement required to trigger a "catch-up" step in a normal healthy animal. See Woodlee et al. (2008) for information on the effects of weight on displacement. Note the distance required is greater than that of the ipsilateral limb in an animal with a unilateral 6-OHDA lesion to the medial forebrain bundle, suggesting a significant degree of adaptive compensation by the unimpaired limb.
Keywords: PIT; 6-OHDA; postural instability test; passive initiation threshold
Downloads: 233
[texts]A New Method of Determining Instability of Linear System - Ides Editor
In this paper, an algorithm is presented for identification of real eigenvalues on right half of the s-plane, for linear systems, hence determining instability of the system. The proposed approach is based on Gerschgorin theorem and a new approach of Bisection method. The method is efficient since there is no need to determine all real eigenvalues and also characteristic polynomial of the system matrix...
Keywords: Instability; System matrix; Gerschgorin theorem; Bisection method; Power system problem
Downloads: 30
[texts]Interpretation of certain phenomena of the magnetosphere by plasma instabilities (interpretation de certains phenomenes de la magnetosphere par des instabilites de plasma) - Stefant, R.
Interpretation of phenomena of magnetosphere by plasma instabilities
Keywords: EARTH MAGNETOSPHERE; MAGNETOHYDRODYNAMIC STABILITY; MAGNETOSPHERE; PLASMA INSTABILITY; What -- Earth
Downloads: 67
[texts]Resonances in Positronium Hydride - DiRienzi, Joseph
We re-examine the problem of calculating the positions and widths of the lowest-lying resonances in the Ps H scattering system which consists of two electrons, one positron and one proton. The first of these resonances, for L=0, was found by the methods of complex rotation and stabilization, and later described as a Feshbach resonance lying close to a bound state in the closed-channel e () H (-) system...
Keywords: NONLINEAR SYSTEMS; CHAOS; DYNAMICAL SYSTEMS; LIQUID-LIQUID INTERFACES; FLOW DISTRIBUTION; SINE WAVES; KELVIN-HELMHOLTZ INSTABILITY; TAYLOR INSTABILITY; VIBRATION EFFECTS; MICROGRAVITY
Downloads: 75
[texts]Acoustic losses of a subscale, cold-flow rocket motor for various ''J'' values - Buffum, F. G.
Geometric variables effect on acoustic attenuation in axial mode combustion instability in subscale rocket engine models
Keywords: ACOUSTIC ATTENUATION; ACOUSTIC INSTABILITY; AXIAL MODES; COMBUSTION STABILITY; ROCKET ENGINES; ACOUSTIC ATTENUATION; COMBUSTION INSTABILITY; GEOMETRIC FACTOR; ROCKET ENGINE
Downloads: 105
[texts]Modulational Instability of Polarized Electromagnetic Waves in Cylindrical Fibers
The polarized electromagnetic wave in cylindrical fibers is described by a system of four component vector nonlinear Schrödinger equations. We have investigated analytically and numerically the modulational instability of this system. Several types of modulational instability are shown to exist depending on the sign of the dispersion coefficients. The results indicate that the group-velocity mismatch and the four wave mixing terms influence considerably the shape, position and especially the nu...
Keywords: Modulation Instability; Cross-phase Modulation; Walk-off Effect; Four Wave Mixing
Downloads: 3
[texts]On an instability linked with the appearance of the equatorial sporadic e-layer (sur une instabilite liee a l'apparition de la couche e sporadique equatoriale) - Storey, O.
Plasma instability linked with appearance of equatorial sporadic E-layer in ionosphere
Keywords: E REGION; MAGNETOHYDRODYNAMIC STABILITY; SPORADIC E LAYER; PLASMA INSTABILITY; SPORADIC E LAYER
Downloads: 37
[audio]Invisible Hailstorm (Atmospheric Instability Remix) - mirage, F e t c h e r
Invisible Hailstorm (Atmospheric Instability Remix)
Keywords: Invisible Hailstorm; Atmospheric Instability Remix; mirage; F e t c h e r
Downloads: 11
[texts]PHYSICAL SELENOGRAPHY - SHEVCHENKO, V. V
PHYSICAL SELENOGRAPHY IS DISCUSSED IN LIGHT OF THE MOST RECENT OBSERVATIONS (LUNOKHOD-1, APOLLO, OBSERVATIONS FROM THE EARTH). THE GAS DISTRIBUTION, SURFACE COMPOSITION, AND OTHER PHYSICAL FEATURES OF THE MOON ARE DISCUSSED.
Keywords: ATS 1; GEOMAGNETIC MICROPULSATIONS; MAGNETOSPHERIC INSTABILITY; MAGNETOSPHERIC ELECTRON DENSITY; PROTON RESONANCE
Downloads: 96
[texts]Nonlinear aspects of combustion instability in liquid propellant rocket motors fourth yearly progress report, 1 jun. 1963 - 31 may 1964 - Harrje, D. T.
Nonlinear combustion instability in liquid propellant rocket engines
Keywords: COMBUSTION STABILITY; LIQUID PROPELLANT ROCKET ENGINES; NONLINEARITY; COMBUSTION INSTABILITY; LIQUID PROPELLANT ROCKET ENGINE
Downloads: 188
[texts]High temperature resistant polyimide from tetra ester, diamine, diester and N-arylnadimide - NON
The invention described relates to improved polyimide resins which are noted for their high thermal and oxidative stability, high strength at elevated temperatures and which exhibit many other outstanding physical and chemical properties, especially useful in high temperature applications. The polyimides are prepared by the reaction, with application of heat of a mixture of monomers comprising: (1) a dialkyl or tetraalkyl ester of an aromatic tetracarboxylic acid, (2) and aromatic diamine, (3) a...
Keywords: CIRCULAR CYLINDERS; ROTATING FLUIDS; TAYLOR INSTABILITY; VORTICES; BOUSSINESQ APPROXIMATION; KINEMATICS; NONLINEARITY; TIME DEPENDENCE; VISCOSITY
Downloads: 69
[texts]Memory-based reasoning for advanced launch system operations - Myler, Harley R.
No Abstract Available
Keywords: HERTZSPRUNG-RUSSELL DIAGRAM; KELVIN-HELMHOLTZ INSTABILITY; STELLAR EVOLUTION; ASTRONOMICAL MODELS; STELLAR MASS; STELLAR RADIATION
Downloads: 62
[texts]Detecting Malicious Dropping Attack in the Internet
The current interdomain routing protocol, BorderGateway Protocol, is limited in implementations of universalsecurity. Because of this, it is vulnerable to many attacks atthe AS to AS routing infrastructure. Initially, the majorconcern about BGP security is that malicious BGP routerscan arbitrarily falsify BGP routing messages and spreadincorrect routing information. Recently, some authors havepointed out the impact of a type of attack, namely selectivedropping or malicious dropping attack that h...
Keywords: Internet Routing Security; Selective or malicious Dropping Attacks; BGP; Instability Analysis; Malicious Routers
Downloads: 7
[texts]The effect of transfer processes on the stability of a plane flame front - Istratov, A. G.
Absolute instability of plane laminar flame front
Keywords: FLAME PROPAGATION; FLAMES; LAMINAR FLOW; LANDAU FACTOR; REYNOLDS NUMBER; STABILITY; INSTABILITY; LAMINAR FLAME
Downloads: 53
[texts]NASCAP-2K: An Overview - Mandell, M. J.
Nascap-2k is the modern replacement for the older 3-D charging codes NASCAP/GEO, NASCAP/LEO, POLAR, and DynaPAC. Built on the DynaPAC kernel and incorporating surface charging, environment and space potential models from the older codes, Nascap-2k performs charging calculations for a wide variety of space environments under control of a unified graphical interface. In this paper we illustrate the use of Nascap-2k for spacecraft charging calculations...
Keywords: HYPERSONIC WIND TUNNELS; HIGH TEMPERATURE TESTS; CALIBRATING; AIR BREATHING ENGINES; FLOW CHARACTERISTICS; ACOUSTIC INSTABILITY; LIQUID OXYGEN
Downloads: 76
[audio]"The Yellow Wallpaper" by Charlotte Perkins Gilman (read by Xe Sands) - Charlotte Perkins Giman
Short story written by Charlotte Perkins Gilman, considered an important early work of feminist fiction. The story depicts the effect of confinement on the narrator's mental health, and her descent into psychosis.
Keywords: insanity; confinement; short story; mental illness; anxiety; nervousness; neurosis; marriage; instability; audio; audiobook; story; book
Downloads: 395
[texts]Low and high velocity impact response of thick hybrid composites - Hiel, Clement
The effects of low and high velocity impact on thick hybrid composites (THC's) were experimentally compared. Test Beams consisted of CFRP skins which were bonded onto an interleaved syntactic foam core and cured at 177 C (350 F). The impactor tip for both cases was a 16 mm (0.625 inch) steel hemisphere. In spite of the order of magnitude difference in velocity ranges and impactor weights, similar relationships between impact energy, damage size, and residual strength were found...
Keywords: BOUNDARY LAYER FLOW; GOERTLER INSTABILITY; SURFACE ROUGHNESS; VORTICES; WALL FLOW; FLOW STABILITY; FREE FLOW
Downloads: 176
[texts]Optimal Reflectance, Transmittance, and Absorptance Wavebands and Band Ratios for the Estimation of Leaf Chlorophyll Concentration - Carter, Gregory A.
The present study utilized regression analysis to identify: wavebands and band ratios within the 400-850 nm range that could be used to estimate total chlorophyll concentration with minimal error; and simple regression models that were most effective in estimating chlorophyll concentrations were measured for two broadleaved species, a broadleaved vine, a needle-leaved conifer, and a representative of the grass family.Overall, reflectance, transmittance, and absorptance corresponded most precisel...
Keywords: SOUND WAVES; ACOUSTIC INSTABILITY; AEROACOUSTICS; RADIATION SOURCES; EULER EQUATIONS OF MOTION; DIFFERENTIAL EQUATIONS; INTEGRALS
Downloads: 78
[texts]Hand-held self-maneuvering unit Patent - Huber, W. C.
Hand-held maneuvering unit for propulsion and attitude control of astronauts in zero or reduced gravity environment
Keywords: ABLATIVE MATERIALS; ACOUSTIC INSTABILITY; COMBUSTION STABILITY; COMBUSTION CONTROL; HEAT TRANSFER; INJECTORS; LININGS; SYSTEMS ENGINEERING
Downloads: 67
[texts]A new ignition scheme using hybrid indirect-direct drive for inertial confinement fusion - Zhengfeng Fan, Mo Chen, Zhensheng Dai, Hong-bo Cai, Shao-ping Zhu, W. Y. Zhang, X. T. He
A new hybrid indirect-direct-drive ignition scheme is proposed for inertial confinement fusion: a cryogenic capsule encased in a hohlraum is first compressed symmetrically by indirect-drive x-rays, and then accelerated and ignited by both direct-drive lasers and x-rays. A steady high density plateau newly formed between the radiation and electron ablation fronts suppresses the rarefaction at the radiation ablation front and greatly enhances the drive pressure...
Keywords: Inertial confinement fusion; Hybrid indirect-direct drive; Double ablation; Rapid ignition; Lower hydrodynamic instability growth
Downloads: 77
[texts]The decomposition of a viscous fuel film in air (k raspadu plenki vyazkogo topliva v vozdukhe) - Lyshevskiy, A. S
Instability and criteria for decomposition of viscous fuel film in air based on waves on separation surface
Keywords: DECOMPOSITION; JET ENGINE FUELS; PROPELLANT DECOMPOSITION; STABILITY; VISCOUS FLUIDS; INSTABILITY; JET FUEL; PROPELLANT DECOMPOSITION; VISCOUS FLUID
Downloads: 56
[audio]Jospeh Stiglitz - The Global Financial System
Joseph Stiglitz Nobel Prize winner talks about global economic instability, causes and consequences of the Asian crises, the American trade deficit, the cost of economic instability for the developing countries, the deregulation of the financial markets, the global financial institutions, deficits, global aggregate demand.
Keywords: Wall Street; IMF; International monetary fund; poverty; global financial system; trade deficits; Asian financial crises; financial markets deregulation; global financial instability; the cost of global financial instability to developing countries
Downloads: 113
[texts]On the instability of a nonuniform rarefied plasma in an intense magnetic field - Rudakov, L. I.
Instability of nonuniform rarefied plasma in intense magnetic field
Keywords: MAGNETIC FIELDS; MAGNETIC FLUX; MAGNETOHYDRODYNAMIC STABILITY; NONUNIFORM PLASMAS; RAREFIED PLASMAS; MAGNETIC FIELD INTENSITY; NONUNIFORM PLASMA; PLASMA INSTABILITY; RAREFIED PLASMA
Downloads: 76
[texts]Charts showing relations among primary aerodynamic variables for helicopter-performance estimation - Talkin, Herbert
In order to facilitate solutions of the general problem of helicopter selection, the aerodynamic performance of rotors is presented in the form of charts showing relations between primary design and performance variables. By the use of conventional helicopter theory, certain variables are plotted and other variables are considered fixed. Charts constructed in such a manner show typical results, trends, and limits of helicopter performance...
Keywords: STRESSED SKIN-STIFFENER COMBINATIONS - BUCKLING; BEAMS - FLANGES; COLUMNS - INSTABILITY; COLUMNS - BUCKLING & TORSION; PLATES, FLAT - BUCKLING; LOADS - COLUMN
Downloads: 124
[texts]Turbulence, Plasma Containment, and Galaxies (Volume 86) - Lin, C.C.
Journal of Research of the National Bureau of Standards
Keywords: density wave; galactic spirals; hydrodynamic instability and turbulence; plasma dynamics; spiral grand design; W ASER; winding dilemma
Downloads: 122
[texts]Nonlinear aspects of combustion instability in liquid propellant rocket motors Status report, 1 Jun. 1966 - 31 May 1967 - Black, G. R.
Nonlinear aspects of combustion instability in liquid propellant rocket engines
Keywords: COMBUSTION STABILITY; LININGS; LIQUID PROPELLANT ROCKET ENGINES; NONLINEARITY; PROPELLANT COMBUSTION; COMBUSTION INSTABILITY; LIQUID PROPELLANT ROCKET ENGINE; NONLINEARITY; PROPELLANT COMBUSTION
Downloads: 217
[texts]SILICATES AND CHROMITE IN THE MULTIMINERAL INCLUSIONS OF THE SIKHOTE-ALIN OCTAHEDRITE - ZASLAVSKAYA, N. I.
SILICATES AND CHROMITE IN THE RELATIVELY RARE MULTI-MINERAL INCLUSIONS OF THE SIKHOTE-ALIN OCTAHEDRITE ARE STUDIED. UNDER X-RAY DIFFRACTION ANALYSIS, SEPARATE SILICATE GRAINS FROM THE THREE INCLUSIONS FOUND WERE SHOWN TO BE MOSTLY PYROXENE AS WELL AS OLIVINE. TABLES ARE INCLUDED GIVING X-RAY DIFFRACTION DATA (POWDER PATTERNS) FOR THE SILICATES AND CHROMITE OF THE INCLUSIONS.
Keywords: MAGNETOSPHERIC INSTABILITY; MORTALITY; SOLAR ACTIVITY EFFECTS; STATISTICAL CORRELATION; GEOMAGNETIC PULSATIONS; HEART DISEASES; HUMAN REACTIONS; IONOSPHERIC DISTURBANCES; PUBLIC HEALTH
Downloads: 68
[texts]A theoretical study of nonlinear combustion instability- longitudinal mode - Sirignano, W. A
Nonlinear combustion instability in rocket combustors - longitudinal oscillation
Keywords: COMBUSTION; ROCKET COMBUSTOR; COMBUSTION CHAMBERS; COMBUSTION STABILITY; NONLINEAR SYSTEMS; NONLINEARITY; OSCILLATIONS; ROCKET ENGINES; COMBUSTION INSTABILITY; NONLINEAR SYSTEM
Downloads: 125
[texts]Solar Terrestrial Observatory Space Station Workshop Report - NON
In response to a need to develop and document requirements of the Solar Terrestrial Observatory at an early time, a mini-workshop was organized and held on June 6, 1985. The participants at this workshop set as their goal the preliminary definition of the following areas: (1) instrument descriptions; (2) placement of instrumentation on the IOC Space Station; (3) servicing and repair assessment; and (4) operational scenarios...
Keywords: BOUNDARY LAYER FLOW; UNSTEADY FLOW; WALL FLOW; TAYLOR INSTABILITY; TOLLMIEN-SCHLICHTING WAVES; VORTICES; CHANNEL FLOW; CONCAVITY; CONVEXITY; MODELS; NONLINEARITY
Downloads: 59
[audio]Polarized politics alienates the middle - CBC National
Polarized politics alienates the middle "rational" voters and allows democracry to be hijacked by extremists
Keywords: polarized; politics; extremists; right; wing; political; instability; genetics; alienated; rhetoric; stays home; elections; born; filters; ration middle; predisposition; biological factor; orientation; born with; outlook; determines. human; gene; aljezeerah
Downloads: 18
[texts]Dynamic file-access characteristics of a production parallel scientific workload - Kotz, David
Multiprocessors have permitted astounding increases in computational performance, but many cannot meet the intense I/O requirements of some scientific applications. An important component of any solution to this I/O bottleneck is a parallel file system that can provide high-bandwidth access to tremendous amounts of data in parallel to hundreds or thousands of processors. Most successful systems are based on a solid understanding of the expected workload, but thus far there have been no comprehen...
Keywords: LANDING SITES; PRESSURE MEASUREMENT; TROPICAL REGIONS; WIND MEASUREMENT; LATITUDE; MARS ATMOSPHERE; PLANETARY METEOROLOGY; SITE SELECTION; SYNOPTIC METEOROLOGY; ATMOSPHERIC CIRCULATION; ATMOSPHERIC TEMPERATURE; BAROCLINIC INSTABILITY
Downloads: 43
[movies]Narcissist's Victims' Many Faces - Sam Vaknin
The narcissist's false emanations are not restricted to messages with emotional content. They may contain wrong or false or partial information. The narcissist does not hesitate to lie, deceive, or "reveal" (misleading) half-truths. He appears to be intelligent, charming and, therefore, reliable. He is a convincing conjurer of words, signs, behaviours, and body language. The above two classes of victims are casually exploited and then discarded by the narcissist...
Keywords: narcissist; narcissism; abuse; victim; instability; unpredictability; sadism; masochism; punishment; authority; emotions; pretensions; fake; boss; employer; spouse; friends; colleagues; coworkers; workplace; political party; church; social institutions
Downloads: 91
[texts]MMC Ring Fatigue and Fracture Life Prediction: An Engineering Model - Halford, Gary R
The framework of an engineering creep-fatigue durability model has been adapted for use in estimating the radial static burst pressure and cyclic low-cycle fatigue macro-crack initiation resistance of continuous fiber reinforced (CFR) metal matrix composite (NIMC) rings for application at 800 F. Rings of circumfrentially wrapped SCS6/Ti-15-3 were manufactured by Textron Specialty Metals and burst tested by Pratt & Whitney as a part of a cooperative program with the NASA Lewis Research Center...
Keywords: PLASMAPAUSE; ELECTROSTATIC SHIELDING; ELECTRIC FIELDS; TWILIGHT GLOW; UNIFORM FLOW; BULGING; PLASMA DENSITY; PLASMASPHERE; MAGNETOSPHERES; DIURNAL VARIATIONS; GEOPHYSICS; GEOMAGNETISM; MAGNETOSPHERIC INSTABILITY; FLOW DISTRIBUTION
Downloads: 165
[texts]Proceedings of the 2nd Seminar on Automatic Checkout Equipment and Techniques - NON
No Abstract Available
Keywords: INTERPOLATION; GEOPOTENTIAL; METEOROLOGY; VECTOR ANALYSIS; KALMAN FILTERS; NUMERICAL WEATHER FORECASTING; SHALLOW WATER; TWO DIMENSIONAL MODELS; VECTOR PROCESSING (COMPUTERS); BAROCLINIC INSTABILITY; BAROTROPIC FLOW; DATA INTEGRATION
Downloads: 120
[texts]Nonguiding Center Motion and Substorm Effects in the Magnetotail - Kaufmann, Richard L.
Thick and thin models of the middle magnetotail were developed using a consistent orbit tracing technique. It was found that currents carried near the equator by groups of ions with anisotropic distribution functions are not well approximated by the guiding center expressions. The guiding center equations fail primarily because the calculated pressure tensor is not magnetic field aligned. The pressure tensor becomes field aligned as one moves away from the equator, but here there is a small regi...
Keywords: BAROTROPISM; POTENTIAL GRADIENTS; STRATOPAUSE; SPECTRUM ANALYSIS; VORTICITY; BAROCLINIC INSTABILITY; UPPER ATMOSPHERE RESEARCH SATELLITE (UARS); THREE DIMENSIONAL MODELS; ATMOSPHERIC COMPOSITION; MICROWAVE SOUNDING; ATMOSPHERIC TEMPERATURE; ELECTRIC CHARGE; GEOPOTENTIAL
Downloads: 71
[texts]Use of a Prototype Airborne Separation Assurance System for Resolving Near-Term Conflicts During Autonomous Aircraft Operations - Barhydt, Richard
NASA is currently investigating a new concept of operations for the National Airspace System, designed to improve capacity while maintaining or improving current levels of safety. This concept, known as Distributed Air/Ground Traffic Management (DAGTM), allows appropriately equipped autonomous aircraft to maneuver freely for flight optimization while resolving conflicts with other traffic and staying out of special use airspace and hazardous weather...
Keywords: ANNUAL VARIATIONS; HEAT FLUX; CLIMATE; POLAR REGIONS; SIMULATION; MARS ATMOSPHERE; ATMOSPHERIC GENERAL CIRCULATION MODELS; DUST; BAROCLINIC INSTABILITY; MARS ENVIRONMENT; HEAT BALANCE
Downloads: 76
[texts]A multicomponent model of the infrared emission from Comet Halley - Swamy, K. S. Krishna
A model based on a mixture of coated silicates and amorphous carbon grains produces a good spectral match to the available Halley data and is consistent with the compositional and morphological information derived from interplanetary dust particle studies and Halley flyby data. The dark appearance of comets may be due to carbonaceous coatings on the dominant (by mass) silicates. The lack of a 10 micrometer feature may be due to the presence of large silicate grains...
Keywords: GEOMAGNETISM; SECULAR VARIATIONS; SOLAR TERRESTRIAL INTERACTIONS; IONOSPHERIC DISTURBANCES; MAGNETOSPHERIC INSTABILITY; EQUATORIAL ATMOSPHERE; LINES OF FORCE; MAGNETIC ANOMALIES; MAPPING; RING CURRENTS; SATELLITE OBSERVATION
Downloads: 55
[texts]Plasmas in space. unstable longitudinal plasma oscillations technical note - Cooper, E. A.
Longitudinal plasma oscillations - dispersion, velocity distribution, and physical mechanics of plasma instability
Keywords: DISPERSION; LONGITUDINAL WAVE; PLASMA OSCILLATION; PLASMA STABILITY; VELOCITY DISTRIBUTION; LONGITUDINAL WAVES; MAGNETOHYDRODYNAMIC STABILITY; PLASMA OSCILLATIONS; PLASMAS (PHYSICS); STABILITY; VELOCITY DISTRIBUTION; DISPERSION; INSTABILITY
Downloads: 108
[texts]Multigrid calculations of 3-D turbulent viscous flows - Yokota, Jeffrey W
Convergence properties of a multigrid algorithm, developed to calculate compressible viscous flows, are analyzed by a vector sequence eigenvalue estimate. The full 3-D Reynolds-averaged Navier-Stokes equations are integrated by an implicit multigrid scheme while a k-epsilon turbulence model is solved, uncoupled from the flow equations. Estimates of the eigenvalue structure for both single and multigrid calculations are compared in an attempt to analyze the process as well as the results of the m...
Keywords: AIRFOILS; COMPUTATIONAL FLUID DYNAMICS; DAMPING; FINITE DIFFERENCE THEORY; BOUNDARY LAYER CONTROL; BOUNDARY VALUE PROBLEMS; GOERTLER INSTABILITY; LAMINAR BOUNDARY LAYER; LAMINAR FLOW AIRFOILS; VORTICES; BLASIUS FLOW; BOUNDARY LAYER TRANSITION
Downloads: 65
[texts]Interaction and Communication of Agents in Networks and Language Complexity Estimates - Smid, Jan
Knowledge acquisition and sharing are arguably the most critical activities of communicating agents. We report about our on-going project featuring knowledge acquisition and sharing among communicating agents embedded in a network. The applications we target range from hardware robots to virtual entities such as internet agents. Agent experiments can be simulated using a convenient simulation language...
Keywords: MAGNETIC FIELD CONFIGURATIONS; CURRENT DENSITY; PARTICLE ACCELERATION; RELATIVISTIC ELECTRON BEAMS; PLASMA JETS; GAMMA RAY BURSTS; PLASMA WAVES; ACTIVE GALACTIC NUCLEI; LORENTZ FORCE; WEIBEL INSTABILITY
Downloads: 68
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